Anthropomorphic Test Dummy; Six-Year-Old Child Dummy

This document corrects NHTSA's regulation specifying the characteristics of the test dummy representing a six-year-old child. It revises the specification for locating the center of gravity (cg) of the thorax by moving it forward 0.4 inches from the location currently specified in part 572. This document also amends the dummy's specifications to show that thorax ballast mass, if used, is mounted on the inside of the anterior wall of the spine box rather than to its sides. Both of these changes bring the drawing specifications in line with the actual construction of the dummy. They are intended to ensure that there is no confusion among dummy manufacturers and users as to whether a particular dummy meets the specifications of NHTSA's regulation.